JP2002197795A - Information reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an information reproducing device which does not abruptly perform the alteration of a reproduction stream when the attribute of the reproduction stream is changed. SOLUTION: The information reproducing device judges whether the attribute of the reproduction stream is changed or not, by detecting the attribute while performing the information reproduction from an information recording medium. If the reproduction stream is changed, the information reproducing device displays the streams which can be selected. The information reproducing device performs the reception for the alternation or confirmation from a user to the display of the streams which can be selected and when the alternation or the confirmation is indicated within a prescribed time, the information reproducing device performs the reproduction of the stream and system setting corresponding to the indication. The information reproducing device automatically selects the optimum stream and performs the alteration to the optimum stream instead of the reception of the indication from the user.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information reproducing apparatus for reproducing information from an information recording medium such as a DVD.
In particular, the present invention relates to an information reproducing apparatus for improving operability and the like.

[0002]

2. Description of the Related Art In recent years, a DVD (Digital Video Disc or Digital Video Disc) has been used as an information recording medium capable of supporting advanced functions.
l Versatile Disc) was developed. This DVD adopts a versatile logical format that enables playback in various sequences by defining various attributes in the playback stream. For example, in addition to simply recording video information and audio information, etc., recording of sub-video information and the like is enabled, and a reproduction sequence of video information, audio information, and sub-video information during reproduction is programmed in advance. It has become possible.

[0003] For this reason, when a title creator or the like intends to produce a DVD recording a foreign movie, for example, in addition to the original picture and the original sound, a Japanese subtitle and a dubbed sound in Japanese are recorded and further various By programming such a reproduction sequence, it is possible to produce and provide a variety of contents that allow the user to select a desired reproduction mode during viewing.

On the other hand, an information reproducing apparatus for reproducing a DVD has
When the user designates a desired playback mode and gives a playback instruction, information (attribute information) of a playback sequence that matches the instructed playback mode is obtained from the DVD, and playback processing is performed in accordance with the playback sequence. It is possible to respond to various requests.

[0005]

Incidentally, it is possible to record not only one title on a DVD but also a plurality of titles.

For example, as shown in FIG. 7A, in a DVD on which three movie titles No. 1 to No. 3 are recorded,
The first movie title No. 1 records sub-picture data SP1 defined as English subtitles and the sub-picture data SP2 defined as Japanese subtitles, and the second movie title No. 2 records subtitles as subtitles. The undefined sub-picture data SP1 is recorded, and the third movie title is recorded.
In No. 3, it is possible to record sub-picture data SP1 defined as English subtitles and sub-picture data SP2 defined as Japanese subtitles.

[0007] When the user instructs a reproduction mode to reproduce in "Japanese subtitles" and instructs a reproduction start, the information reproducing apparatus performs reproduction according to a reproduction sequence suitable for the specified reproduction mode.

However, the above movie titles No. 1 to No. 3
If the attributes of the sub-picture data are different, as in
In some cases, all titles cannot be reproduced according to a specific reproduction sequence that matches the specified reproduction mode. To solve such a problem, for example, the DVD standard uses Algorithm 1 (Algorithm
The optimization processing method 1) is defined.

That is, the first movie title No. 1
Contains sub picture data SP defined as English subtitles
1 and sub-picture data S defined as Japanese subtitles
P2 is recorded, and the second movie title No. 2
Contains sub-picture data SP1 that is not defined as a subtitle, and when the user instructs a reproduction mode to reproduce in "Japanese subtitles" and instructs a reproduction start, the first When playing movie title No. 1, there will be no problem because "Japanese subtitles" will be played, but the second movie title No. 2 will have "subtitles"
Is not defined, so it is inconsistent with the user's instructions. In order to solve such a problem, the information reproducing apparatus performs a reproducing process according to the standard of the algorithm 1, thereby seamlessly and continuously reproducing the first to third video titles No. 1 to No. 3.

In the optimization processing such as Algorithm 1, it is specified that "if the reproduced stream is functional (reproducible), the stream number is not changed". In other words, it is stipulated that "if the currently selected stream can be played, the stream will not be changed, regardless of its attribute." It is possible to seamlessly reproduce even a plurality of titles having different stream attributes.

However, according to the optimization processing, there is a case where a reproduction processing contrary to a user's intention is performed and a problem such as a feeling of strangeness occurs.

For example, as shown in FIG.
Assuming that the user specifies to display “Japanese subtitles” when playing back a DVD in which the movie titles No. 1 to No. 3 are recorded, as shown in FIG. In the first movie title No. 1, the sub-picture data SP2 of "Japanese subtitles" will be reproduced as instructed, and when the next movie title No. 2 moves, the "Japanese subtitles" Defined sub-picture data SP
2 does not exist, the algorithm 1 is activated, and switching is performed so as to automatically reproduce the "no language definition" sub-picture data SP1. And movie title No.3
At the time of playback, it is checked whether there is a stream number switched with the movie title No. 2 and the movie title N
Since sub-picture data SP1 exists in o.3, Algorithm 1 does not start and "English subtitles" are reproduced.

[0013] Therefore, for the user, despite instructing that the movie title No. 3 will also be reproduced in "Japanese subtitles" and instructing "Japanese subtitles", the movie title No. 2 is reproduced. At this time, the above-described attribute switching is performed by starting the algorithm 1, and as a result, the movie title No. 3
However, there is a problem that the playback process is performed contrary to the user's intention because a situation occurs in which the content is played back with "English subtitles".

An object of the present invention is to provide an information reproducing apparatus capable of overcoming such a conventional problem and improving operability for a user.

[0015]

In order to achieve the above object, an information reproducing apparatus of the present invention detects an attribute of a reproduction stream and changes the attribute of the reproduction stream while reproducing information from an information recording medium. It is determined whether or not. And
When it is determined that the attribute of the reproduction stream has changed, a selectable stream is displayed. In addition, for the display of the selectable stream, a change or confirmation is received from the user, and if an instruction for the change or confirmation is given within a predetermined time, the stream corresponding to the instruction is reproduced or the system setting is changed. Do. Instead of receiving an instruction from the user, the optimum stream is automatically selected and changed.

According to the information reproducing apparatus of the present invention, when a reproduced stream is changed, the user is notified of the change, thereby providing effective confirmation information and the like to the user. Further, by accepting various operations in accordance with the information provided to the user, it is possible to expand the range of selection operations for the user.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. In one embodiment, DVD-V
An information reproducing apparatus such as an in-vehicle navigation device and an audio device for reproducing information recorded on an information recording medium (hereinafter, referred to as a “DVD disk”) conforming to the ideo will be described.

First, the logical data structure of a DVD disk conforming to DVD-Video will be outlined with reference to FIG.

In FIG. 1, the volume space of a DVD disc is a UDF (Universal Disc Format) and an ISO 96
Volume and file structure (Vo
lume and Filestructure) and DVD video zone (DV
D-Video zone) and other zones (DVD other zone)
DVD video zone is DVD
It is a data storage area for recording video data. Also, management information necessary for reproducing the DVD video data is stored (recorded) in the DVD video zone.

Furthermore, the DVD video zone includes one video manager (VMG) VMG and one or more video managers.
Video Title Set of 9 or less
VTS # 1 to VTS # i.

A video manager VMG is a video object set for a VMG menu (Video Object Set for VMG Menu) VMGM_VOBS, which is a substance of a reproduction stream.
And a video object set VMG for the VMG menu
Program chain information on the playback method of M_VOBS (P
video manager information (Vis), which is control information indicating program chain information (PGCI) and playback stream attributes, etc.
deo Manager Information) VMGI and backup data VMGI_BUP of video manager information VMGI
Consists of

Furthermore, each video title set VTS
# 1 to VTS # i are VTS menu video object sets (Video Object Set)
forVTS Menu) VTSM_VOBS and Video Object Set for Video Titl
e) VTSTT_VOBS, and program chain information (Program Chain Information: P) relating to a method of reproducing the video object set VTSM_VOBS for menu and the video object set VTSTT_VOBS for title.
Video title set information (Video Title Set Informat), which is control information indicating GCI) and playback stream attributes.
ion) VTSI and video title set information VTSI
Of backup data VTSI_BUP.

Here, the VMG menu video object set VMGM_VOBS, the VTS menu video object set VTSM_VOBS, and the title video object set VTSTT_VOBS are each 1
Video Object (VOB) V
OB # 1 to VOB # j, VOB # 1 to VOB # k, VO
B # 1 to VOB # t, and each video object is composed of a plurality of cells.

That is, a cell is a unit of reproduction of real-time data, and a plurality of cells can be provided in the video manager VMG or the video title set VTS, and the reproduction order is specified by the program chain information PGCI. It has become. In the figure, as a representative example, the cell Ce in the video manager VMG is shown.
11 # 1 to Cell # m.

Further, each cell (represented by Cell # 1) has a plurality of video object units (Video Ob
VOBU) VOBU # 1 to VOBU # n, and each video object unit (VOBU)
U # 1 is represented as a navigation pack (Navigation Pack) NV_PCK always provided at the beginning, and a video pack (Video Pac)
k) It is composed of V_PCK, audio pack (Audio Pack) A_PCK, and sub-picture pack (Sub-picture Pack) SP_PCK.

The navigation pack NV_PCK is a presentation control information packet (PCI) that follows a pack header or the like.
PKT and Data Search Information Packet
tion Packet) DSI_PKT.

The sub-picture pack SP_PCK includes a pack header and reproduction data (compressed reproduction data) recorded after being compressed.

Also, the sub-picture pack SP_PCK includes:
A sub-picture unit is standardized so that coordinate information for indicating a display area of a sub-picture is recorded in a time-division manner, and is generated by connecting a plurality of sub-picture packs SP_PCK during reproduction by an information reproducing apparatus. (Sub-pi
(cture Unit) The sub-picture display control sequence table SP_DCSQT in the SPU can acquire information such as the display area of the sub-picture, display timing, color, and contrast.

Further, in the video manager information VMGI and the video title set information VTSI, which are control data, information such as the attribute of the playback stream included in the video object VOB is recorded in a predetermined map format.

Although a detailed logical data structure is omitted, the video manager information VMGI and the video title set information VTSI include a VMGM_AST_ATR for defining an audio stream attribute of VMGM and a sub-picture stream attribute of VMGM for defining a VMGM sub-picture stream attribute. VMGM
_SPST_ATR, VTSM_AST_ATR for defining VTSM audio stream attributes, VTSM_SPST_AT for defining VTSM sub-picture stream attributes
R, VTS_AST_ATRT, VTS_MU_AST_ATR, VTS for defining audio stream attributes of VTSTT
V to define TT sub-picture stream attributes
TS_SPST_ATR is specified.

In particular, the video title set VTS includes
Up to eight audio streams and up to 32 sub-picture streams can be provided, and different attributes can be defined for each stream.

As the attributes of each audio stream, "audio encoding mode", "audio type", "audio application mode",
It is possible to appropriately define “quantization bit number”, “sampling frequency”, “audio channel number”, “channel attribute” and the like, and furthermore, “sub-picture encoding mode” as a sub-picture stream attribute. ,
“Audio sound mode”, “audio language code extension”, and the like can be appropriately defined.

[0033] The reproduction stream includes attribute information PGC_AST_CTL and PGC_SPST_CT recorded in the PGCI.
L allows the use of a plurality of playback streams to be restricted. For example, when eight audio streams exist in VTSTT_VOBS, the number of streams that can be actually used can be limited to less than eight by the attribute information PGC_AST_CTL.

Next, the configuration of the information reproducing apparatus of the present embodiment will be described with reference to the block diagram of FIG.

The information reproducing apparatus 1 includes a spindle motor 3 for rotating a DVD disk 2 loaded at a predetermined clamp position at a constant linear velocity (or angular velocity);
An optical pickup 4 for optically reading information recorded on the disk 2 and photoelectrically converting the information into an electric signal Si; a feed motor 5 for moving the optical pickup 4 in the radial direction of the DVD disk 2; an RF amplifier 6; A control unit 7;
A digital signal processor 8 and a random access memory (R
AM), and a system controller 17 for centrally controlling the operation of the information reproducing apparatus 1 as a whole.

Here, the RF amplifier 6 generates an RF signal SRF from the electric signal Si output from the optical pickup 4 and outputs the RF signal SRF to the digital signal processor 8, and also detects a tracking error, a focus error, and the like from the electric signal Si. It generates various error signals Se and outputs them to the servo controller 7.

The servo controller 7 controls the spindle motor 3 based on the various error signals Se from the RF amplifier 6 and the synchronization error signal De detected by the digital signal processor 8 in accordance with an instruction from the system controller 17. Servo control (focus servo, tracking servo, rotation servo, tilt servo, etc.) is performed on the optical pickup 4 and the feed motor 5.

The digital signal processor 8 converts the RF signal SRF from the RF amplifier 6 from analog to digital, and then performs signal demodulation and error correction in conformity with the DVD-Video data format and temporarily stores the result in the buffer memory 9. The stored demodulated data Di is output to the stream separation unit 10 and the system controller 17 in accordance with an instruction from the system controller 17. In addition, the synchronous error signal De obtained by the demodulation and error correction processing is supplied to the servo control unit 7.

The stream separation unit 10 converts the demodulated data Di supplied from the digital signal processing unit 8 from the navigation pack NV_PCK and the video pack V_P included in the video object unit VOBU.
CK, audio pack A_PCK, and sub-picture pack SP_PCK are separated and extracted, the separated and extracted navigation pack NV_PCK is to the system controller 17, the video pack V_PCK is to the video decoder 11, the audio pack A_PCK is to the audio decoder 12, the sub-picture pack is SP_PCK is supplied to the sub-picture decoder 13.

The video decoder 11 performs a predetermined decoding process on the video pack V_PCK in accordance with an instruction from the system controller 17, and outputs the decoded video data Dv to the video processor 14.

The audio decoder 11 sends an audio pack A_P according to an instruction from the system controller 17.
CK is subjected to a predetermined decoding process to generate digital audio data Da.
The converter 15 converts the signal into an analog audio signal Sa in an audio frequency band and outputs the signal.

The sub-picture decoder 13 generates a sub-picture unit SPU from the sub-picture pack SP_PCK in accordance with an instruction from the system controller 17 and performs a predetermined decoding process.
The sub-picture data Ds described above is generated and output to the video processor 14. Furthermore, the sub-picture position data indicating the display area of the sub-picture included in the sub-picture unit SPU is also decoded and supplied to the system controller 17.

The video processor 14 receives the video data Dv and the sub-picture data Ds supplied from the video decoder 11 and the sub-picture decoder 13 in accordance with an instruction from the system controller 17, and displays an OSD display described later supplied from the system controller 17. The image data Dvd is generated by combining the image data Dosd with the image data Dosd, and output to the video encoder 16.

The video encoder 16 outputs the image data Dvd
Is converted into digital video data Ddsp or a composite signal Sdsp that can be displayed on a monitor and output. Then, the digital video data Ddsp and the composite signal Sdsp
Is supplied to a monitor (not shown) to cause display.

The system controller 17 includes a microprocessor (MPU) for executing a preset system program and the like, and is included in data supplied from the digital signal processing unit 8 and the stream separation unit 10. Video manager information VMGI, video title set information VTSI, program chain information PG
By analyzing the CI, the reproduction control information PCI, and the data search information DSI, the stream separation unit 10 performs various controls necessary for the reproduction operation. Further, the details will be described later in the operation description, but the system controller 17 analyzes the video manager information VMGI, the video title set information VTSI, the program chain information PGCI, the reproduction control information PCI, and the data search information DSI, The attribute of the playback stream is detected, and based on the detection result, it is determined whether or not the attribute of the playback stream has changed. If the attribute of the playback stream has changed, OSD display that the attribute of the playback stream has changed. And so on.

The system controller 17 further includes an operation unit 18 such as a keyboard and a read-only memory (RO).
M) is connected to the OSD image storage unit 19 formed by M).

The operation unit 18 is provided with operation keys (not shown) for instructing a desired reproduction mode to the system controller 17 by the user.

In the OSD image memory 19, the system controller 17 displays an OSD for prompting the user to perform a desired operation, and the information reproducing apparatus 1
OSD display image data Dosd used when performing OSD display for notifying the operation status of the OSD is stored.

The OSD display is an abbreviation of an on-screen display (On Screen Display), and displays a character, a symbol, a figure, or the like on a monitor screen based on the OSD display image data Dosd. The display content is called OSD display. The OSD display image data Dosd is bitmap data representing characters, symbols, figures, and the like.

Next, the operation of the information reproducing apparatus 1 having such a configuration will be described with reference to the flowchart shown in FIG.

In FIG. 3, when the power is turned on, the operation starts, and it is determined whether or not the DVD disk is loaded at a so-called clamp position (step S100).

When it is determined that a DVD disk is loaded, the process proceeds to step S102, where information in a predetermined area of the DVD disk is read and reproduced, and it is determined whether an automatic reproduction command has been obtained. In addition, it is determined whether or not a reproduction start command has been issued from the operation unit 18 by the user. Then, when an automatic reproduction command is obtained or when a reproduction start command is issued by the user, the flow shifts to step S104 to start reproduction of information recorded in the DVD video zone. When the user instructs a desired reproduction mode and issues a reproduction start instruction, information of a stream attribute suitable for the specified reproduction mode is obtained from the DVD disc, and firstly, based on the information of the stream attribute, the information is obtained. Automatically select the title stream to play.

Next, in step S106, the attribute of the reproduction stream is detected, and it is determined whether or not the attribute has changed.

Here, whether or not the attribute of the audio stream has changed is determined by the video manager information VMGI.
Manager information management table VM included in
Audio stream attribute VMGM_AST_A in GI_MAT
TR and video title set information management table VTSI_MAT included in video title set information VTSI
Audio stream attribute VTSM_AST_ATR, audio stream attribute table VTS_AST_ATRT, and multi-channel audio stream attribute table VTS
This is performed by checking _MU_AST and attribute information PGC_AST_CTLT in the program chain information PGCI.

The determination as to whether or not the attribute of the sub-picture stream has changed is based on the video manager information VMGI.
Manager information management table VM included in
Sub-picture stream attribute in GI_MAT VMGM_SPS
T_ATR and a video title set information management table VTSI included in the video title set information VTSI
_Sub picture stream attribute in MAT VTSM_SPST_AT
R and sub-picture stream attribute table VTS_SPST_A
This is performed by checking the TRT and the attribute information PGC_SPST_CTL in the program chain information PGCI.

Then, only the attributes of the stream currently being reproduced are monitored, and even if other streams change, they are not detected, but are detected only when the attributes of the stream being reproduced are changed. Judge the change of the attribute.

However, irrespective of the stream currently being reproduced, it is also possible to detect a change in any one of the stream attributes and determine a change in the attribute of the reproduced stream.

If it is determined that the attribute of the reproduction stream has not changed (in the case of "NO"), the flow shifts to step S110 to change the stream without changing the stream.
The reproduction process from step S104 is continued.

On the other hand, if it is determined that the playback stream attribute has changed (in the case of “YES”), the flow shifts to step S 108 to change the playback stream for the DVD for which the change of the playback stream is prohibited.
Whether the disc is a disc is determined based on attribute information recorded on the DVD disc. It should be noted that whether or not the change of the reproduction stream is prohibited is determined by the PGC_UOP_CTL and VOBU_UOP_C in the program chain information PGCI.
It is based on TL.

This PGC_UOP_CTL and VOBU_UOP_CTL
Is information for identifying whether the operation by the user is permitted, and the identification information is allocated to the reproduction stream. That is, this PGC_UOP_CTL and VOBU_U
The reproduction stream to which the identification information for prohibiting the operation by the user is assigned by OP_CTL is standardized so that the stop of the reproduction is prohibited.

If the change of the reproduction stream is prohibited ("NO"), step S110 is executed.
To step S without changing the stream
The reproduction process from 104 is continued.

When the change of the reproduction stream is not prohibited (in the case of “YES”), a “stream status notification screen” indicating the currently selectable stream as shown in FIG. 4 is displayed on the monitor by OSD. By doing so, the stream selection from the user is accepted. For example, DVD
Based on the attribute information recorded on the disc, a notification screen LSTa for indicating a currently selectable subtitle language and a notification screen LSTb for indicating a currently selectable audio language are displayed. Are displayed by pointing the attribute of the cursor by cursor display Ka and Kb of arrow symbols.

Then, the flow shifts to step S112, where it is determined whether or not the DVD disk is permitted to be temporarily stopped based on the attribute information recorded on the DVD disk. Here, the determination as to whether the suspension is permitted is made based on the program chain information PGCI described above.
This is performed based on the PGC_UOP_CTL and VOBU_UOP_CTL.

If the suspension is permitted ("YES"), the reproduction is paused (PAUSE) at step S114, and then the reproduction is paused at step S116.
Move to the processing of.

If the temporary stop is not permitted (in the case of "NO"), the process proceeds to step S116 without performing the process of step S114.

If the user does not give an instruction even after the predetermined time elapses, step S
At 116, it is determined whether or not this time has elapsed.
After terminating the display of the “stream status notification screen” in step 124, the process proceeds to step S without changing the stream.
Go to 126. Then, in step S126, it is confirmed again whether or not the pause is being performed. If the pause is not being performed, the reproduction process from step S104 is continued. If the pause is being performed, the pause is released in step S128. After setting to a reproducible state, the reproduction process from step S104 is continued.

On the other hand, if the user gives an instruction to change the stream using the operation keys of the operation unit 18 according to the “stream status notification screen” before the predetermined time elapses in step S116, the process proceeds to step S118. The stream change instruction is received, and FIG.
An OSD display for notifying that a change instruction has been made as shown in FIG.

That is, when the user operates the operation keys of the operation unit 18, the cursor displays Ka, Kb
Can be changed. As shown in FIG. 5, the subtitle language selection item can be moved to the position of “<3> Japanese” or “<2> English” shown in FIG. Is notified to the effect of changing to each stream.

Then, in step S120, when the user instructs the selection through the operation unit 18, the process proceeds to step S122 to change to the specified stream and terminate the display of the "stream status notification screen". Then, in step S126, it is confirmed again whether or not the pause is being performed. If the pause is not being performed, the reproduction process from step S104 is continued. If the pause is being performed, the pause is released in step S128. Is set to a reproducible state according to step S104.
The reproduction process from is continued.

As described above, when the information reproducing apparatus of this embodiment detects that the attribute of the selectable reproduction stream has changed, the information reproduction apparatus displays the OSD for prompting the user to change or confirm the stream. In addition, it is possible to solve the problem that the reproduction is performed based on the stream attribute that the user did not expect.

In the case of a DVD disk for which the pause of the reproduction process is permitted, after detecting that the attribute of the reproduction stream has changed, an OSD display for urging the user to change or confirm the stream is displayed. At the same time, the reproduction process is temporarily stopped, so that it is possible to reproduce the stream attribute more reliably from the changed portion of the stream attribute based on the stream attribute desired by the user.

The OSD is displayed to prompt the user to change or confirm the stream, and if the stream change instruction is not issued until a predetermined time has elapsed, the stream is not changed. By such processing, the range of operation selection for the user is expanded, and operability can be improved.

In the present embodiment, the case where the stream attribute defined in the sub-picture information or the like has changed has been described. When the channel attribute value such as multi-channel playback changes, the optimal speaker arrangement for the user
When a D is displayed and a confirmation from the user is received, an optimal system setting can be made.

In the present embodiment, when a change in the stream attribute is detected, the user is caused to manually select a stream. In addition, a preset subtitle language for initial setting and an initial It is also possible to automatically change to the optimal stream based on the value of the audio language for setting.

[0075]

As described above, according to the information reproducing apparatus of the present invention, when the reproduced stream is changed, the user is positively notified of the change, thereby providing effective confirmation information to the user. Etc. can be provided. For this reason, it is possible to solve the problem that a stream that is unexpected for the user is reproduced, thereby improving operability for the user.

When the playback stream changes,
Since the user is positively informed of the fact and accepts an instruction from the user in response to the notification, it is possible to expand the range of the selection operation for the user.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a logical data structure of a DVD-Video.

FIG. 2 is a block diagram illustrating a configuration of the information reproducing apparatus of the present embodiment.

FIG. 3 is a flowchart for explaining the operation of the information reproducing apparatus.

FIG. 4 is an OSD performed in response to a change in stream attributes.
It is a figure showing an example of a display.

FIG. 5 is a diagram showing an example of O performed in response to a change in stream attributes.
It is a figure showing an example of SD display.

FIG. 6 is a diagram showing an example of O performed in response to a change in stream attributes.
It is a figure showing an example of SD display.

FIG. 7 is a diagram for describing a problem caused by the standard of Algorithm 1.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Information reproduction apparatus 2 ... DVD disk 4 ... Pickup 6 ... RF amplifier 8 ... Digital signal processing part 10 ... Stream separation part 11 ... Video decoder 13 ... Sub picture decoder 14 ... Video processor 16 ... Video encoder 17 ... System controller 18 ... Operation unit 19: OSD image storage unit

Claims (5)

[Claims] 1. An information reproducing apparatus for reproducing information recorded on an information recording medium, comprising: detecting means for detecting an attribute of a reproduction stream selectable at the time of reproduction; An information reproducing apparatus comprising: a determination unit configured to determine whether an attribute of a playback stream has changed; and a display unit configured to display a selectable stream when the determination unit determines that the attribute of the playback stream has changed. apparatus. 2. A method according to claim 1, further comprising a receiving unit for receiving a change or confirmation of a stream desired by the user from the selectable streams displayed by the display unit, and reproducing the stream for which the change or confirmation has been instructed. The information reproducing apparatus according to claim 1, wherein 3. An accepting unit for accepting a change or confirmation of an attribute of a selectable stream displayed by the display unit to an attribute desired by a user, wherein system setting is performed in accordance with the attribute for which a change or confirmation instruction has been given. The information reproducing apparatus according to claim 1, wherein the information reproducing is performed. 4. The receiving means does not receive a change or confirmation unless a change instruction is given from a user until a predetermined time elapses with respect to the display by the display means. Or the information reproducing apparatus according to 3. 5. The information reproducing apparatus according to claim 1, wherein when the judging means judges that the attribute of the reproduction stream has changed, an optimum stream is selected based on preset optimum reproduction conditions. apparatus.